2 Unix SMB/Netbios implementation.
4 store smbd profiling information in shared memory
5 Copyright (C) Andrew Tridgell 1999
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #define IPC_PERMS ((SHM_R | SHM_W) | (SHM_R>>3) | (SHM_R>>6))
28 static BOOL read_only;
30 struct profile_header *profile_h;
31 struct profile_stats *profile_p;
33 BOOL do_profile_flag = False;
34 BOOL do_profile_times = False;
36 struct timeval profile_starttime;
37 struct timeval profile_endtime;
38 struct timeval profile_starttime_nested;
39 struct timeval profile_endtime_nested;
41 /****************************************************************************
42 receive a set profile level message
43 ****************************************************************************/
44 void profile_message(int msg_type, pid_t src, void *buf, size_t len)
48 memcpy(&level, buf, sizeof(int));
50 case 0: /* turn off profiling */
51 do_profile_flag = False;
52 do_profile_times = False;
53 DEBUG(1,("INFO: Profiling turned OFF from pid %d\n", (int)src));
55 case 1: /* turn on counter profiling only */
56 do_profile_flag = True;
57 do_profile_times = False;
58 DEBUG(1,("INFO: Profiling counts turned ON from pid %d\n", (int)src));
60 case 2: /* turn on complete profiling */
61 do_profile_flag = True;
62 do_profile_times = True;
63 DEBUG(1,("INFO: Full profiling turned ON from pid %d\n", (int)src));
65 case 3: /* reset profile values */
66 memset((char *)profile_p, 0, sizeof(*profile_p));
67 DEBUG(1,("INFO: Profiling values cleared from pid %d\n", (int)src));
72 /****************************************************************************
73 receive a request profile level message
74 ****************************************************************************/
75 void reqprofile_message(int msg_type, pid_t src, void *buf, size_t len)
80 level = 1 + (do_profile_flag?2:0) + (do_profile_times?4:0);
84 DEBUG(1,("INFO: Received REQ_PROFILELEVEL message from PID %u\n",(unsigned int)src));
85 message_send_pid(src, MSG_PROFILELEVEL, &level, sizeof(int), True);
88 /*******************************************************************
89 open the profiling shared memory area
90 ******************************************************************/
91 BOOL profile_setup(BOOL rdonly)
93 struct shmid_ds shm_ds;
98 /* try to use an existing key */
99 shm_id = shmget(PROF_SHMEM_KEY, 0, 0);
101 /* if that failed then create one. There is a race condition here
102 if we are running from inetd. Bad luck. */
104 if (read_only) return False;
105 shm_id = shmget(PROF_SHMEM_KEY, sizeof(*profile_h),
106 IPC_CREAT | IPC_EXCL | IPC_PERMS);
110 DEBUG(0,("Can't create or use IPC area. Error was %s\n",
116 profile_h = (struct profile_header *)shmat(shm_id, 0,
117 read_only?SHM_RDONLY:0);
118 if ((long)profile_p == -1) {
119 DEBUG(0,("Can't attach to IPC area. Error was %s\n",
124 /* find out who created this memory area */
125 if (shmctl(shm_id, IPC_STAT, &shm_ds) != 0) {
126 DEBUG(0,("ERROR shmctl : can't IPC_STAT. Error was %s\n",
131 if (shm_ds.shm_perm.cuid != sec_initial_uid() || shm_ds.shm_perm.cgid != sec_initial_gid()) {
132 DEBUG(0,("ERROR: we did not create the shmem (owned by another user)\n"));
136 if (shm_ds.shm_segsz != sizeof(*profile_h)) {
137 DEBUG(0,("WARNING: profile size is %d (expected %d). Deleting\n",
138 (int)shm_ds.shm_segsz, sizeof(*profile_h)));
139 if (shmctl(shm_id, IPC_RMID, &shm_ds) == 0) {
146 if (!read_only && (shm_ds.shm_nattch == 1)) {
147 memset((char *)profile_h, 0, sizeof(*profile_h));
148 profile_h->prof_shm_magic = PROF_SHM_MAGIC;
149 profile_h->prof_shm_version = PROF_SHM_VERSION;
150 DEBUG(3,("Initialised profile area\n"));
153 profile_p = &profile_h->stats;
154 message_register(MSG_PROFILE, profile_message);
155 message_register(MSG_REQ_PROFILELEVEL, reqprofile_message);